Reduce high CPU usage by TFA

Problem:

Cluster nodes experienced high CPU usage, after investigation one of the top CPU consumers on the server has been found to be a TFA process (2nd place):

 # Fri Feb 19 17:44:01 2021
AllCPU  OneCPU  PID     User    PR      NI      STime   RSS     Name
--------------------------------------------------------------------------------
11.75%  94.02%  23895   root    20      0       17:43   87M     ora_m001_ORCL2
1.42%   11.39%  2468    root    20      0       Feb02   736M    /opt/oracle.ahf/jre/bin/java -server -Xms256m -Xmx512m -Djava.awt.headless=true -Ddisable.checkForUpdate=true -XX:HeapDumpPath=/u01/app/oracle.ahf/data/rac02/diag/tfa -XX:ParallelGCThreads=5 oracle.rat.tfa.TFAMain /opt/oracle.ahf/tfa

Workaround:

In newer version of TFA, you can set CPU resource limit.

tfactl setresourcelimit 
 [-tool tool_name] 
 [-resource resource_type] 
 [-value value]

To limit TFA to a maximum of 50% of a single CPU, run the following:

# tfactl setresourcelimit -value 0.5

For more information, please check TFA official documentation.

If you don’t have newer version of TFA, you need to upgrade it first.

About Mariami Kupatadze
Oracle Certified Master Linkedin: https://www.linkedin.com/in/mariami-kupatadze-01074722/

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